Great-West International Index Fund

Fund Summary

Investment Objective

The Fund seeks investment results, before fees and expenses, that track the total return of the common stocks that comprise the MSCI EAFE (Europe, Australasia, Far East) Index (the “Benchmark Index”).

Fees and Expenses of the Fund

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. This table does not reflect the fees and expenses of any Permitted Account. If the fees and expenses imposed by a Permitted Account were reflected, the fees and expenses shown below would be higher.

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Great-West International Index Fund		Institutional Class	Investor Class	Class L
Management Fees		0.25%	0.25%	0.25%
Distribution and Service (12b-1) Fees		none	none	0.25%
Total Other Expenses		0.05%	0.40%	0.40%
Shareholder Services Fees		none	0.35%	0.35%
Other Expenses	[1]	0.05%	0.05%	0.05%
Total Annual Fund Operating Expenses		0.30%	0.65%	0.90%

Example

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example does not reflect the fees and expenses of any Permitted Account. If the fees and expenses of any Permitted Account were reflected, the fees and expenses in the Example would be higher.

The Example assumes that you invest $10,000 in the Fund for the time periods indicated and applies whether you hold or redeem all of your shares at the end of each period. The Example also assumes that your investment has a 5% return each year, that all dividends and capital gains are reinvested, and that the Fund’s operating expenses are the amount shown in the fee table and remain the same for the years shown. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

Expense Example - Great-West International Index Fund - USD ($)	1 Year	3 Years	5 Years	10 Years
Institutional Class	31	97	169	381
Investor Class	66	208	362	810
Class L	92	287	498	1,108

Expense Example, No Redemption - Great-West International Index Fund - USD ($)	1 Year	3 Years	5 Years	10 Years
Institutional Class	31	97	169	381
Investor Class	66	208	362	810
Class L	92	287	498	1,108

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s turnover rate was 7% of the average value of its portfolio.

Principal Investment Strategies

Under normal circumstances, the Fund invests at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in common stocks of the Benchmark Index or in derivative securities economically related to the Benchmark Index. The Fund will seek investment results, before fees and expenses, that track the total return of the Benchmark Index. This may be accomplished through ownership of all the stocks in the Benchmark Index, a statistically selected sampling of the stocks in the Benchmark Index, and/or through a combination of stock ownership, owning derivatives such as futures contracts on the Benchmark Index and options on futures contracts, and owning exchange-traded funds that seek to track the Benchmark Index. The Fund does not necessarily invest in all of the stocks in the Benchmark Index, or in the same weightings as the stocks have in the Benchmark Index. The Fund’s Sub-Adviser chooses investments so that the market capitalizations, industry weightings, and other fundamental characteristics of the stocks chosen are similar to those of the Benchmark Index.

The Fund’s Benchmark Index is the MSCI EAFE Index. The MSCI EAFE Index is a free float-adjusted market capitalization index that is designed to measure the equity performance of developed markets, excluding the U.S. and Canada. As of December 31, 2017, the MSCI EAFE Index consisted of 21 developed market country indices.

Principal Investment Risks

The following is a summary of the principal investment risks of investing in the Fund:

Currency Risk - Adverse fluctuations in exchange rates between the U.S. Dollar and other currencies may cause the Fund to lose money on investments denominated in foreign currencies.

Derivatives Risk - Using derivatives can disproportionately increase losses and reduce opportunities for gains when stock prices, currency rates or interest rates are changing. The Fund may not fully benefit from or may lose money on derivatives if changes in their value do not correspond accurately to changes in the value of the Fund’s holdings. The other parties to certain derivative contracts present the same types of credit risk as issuers of fixed income securities. Derivatives can also make a fund less liquid and harder to value, especially in declining markets, and may increase the Fund’s volatility. There can be no assurance that the Fund’s use of derivative contracts will work as intended, and it is possible for the Fund to lose more than its original investment.

Exchange-Traded Fund (“ETF”) Risk - An ETF is subject to the risks associated with direct ownership of the securities comprising the index on which the ETF is based. Fund shareholders indirectly bear their proportionate share of the expenses of the ETFs in which the Fund invests. Lack of liquidity in an ETF could result in it being more volatile.

Foreign Securities Risk - Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, currency valuation or economic developments.

Geographic Concentration Risk - Geographic concentration risk is the risk that economic, political and social conditions in a single country, a limited number of countries or a particular geographic region in which the Fund focuses its investments will have a significant impact on the performance of the Fund.

Index Risk - It is possible the Benchmark Index may perform unfavorably and/or underperform the market as a whole. The Fund is not actively managed and the portfolio managers do not attempt to take defensive positions in declining markets. Maintaining investments in securities regardless of market conditions or the performance of individual securities could cause the Fund’s return to be lower than if the Fund employed an active strategy.

Market Risk - Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market or economic developments in the U.S. and in other countries. Market risk may affect a single company, a sector of the economy, or the market as a whole.

Tracking Error Risk - The Fund may not be able to precisely track the performance of the Benchmark Index.

An investment in the Fund is not a deposit with a bank, is not insured, endorsed or guaranteed by the FDIC or any government agency, and is subject to the possible loss of your original investment.

Performance

The bar chart and table below provide an indication of the risk of investment in the Fund by showing changes in the performance of the Fund’s Investor Class shares in each full calendar year since inception and by comparing the Fund’s Institutional Class and Investor Class average annual total return to the performance of a broad-based securities market index. No Class L share performance data is provided because Class L shares have not commenced operations. Class L share performance information will appear in future versions of this Prospectus after Class L shares have annual returns for at least one complete calendar year. The returns shown below are historical and are not an indication of future performance. Total return figures assume reinvestment of dividends and capital gains distributions and include the effect of the Fund’s recurring expenses, but do not include fees and expenses of any Permitted Account. If those fees and expenses were reflected, the performance shown would have been lower.

Updated performance information may be obtained at www.greatwestfunds.com (the website does not form a part of this Prospectus).

Calendar Year Total Returns

	Quarter Ended	Total Return
Best Quarter	September 2013	11.26%
Worst Quarter	September 2015	-10.06%

Average Annual Total Returns for the Periods Ended December 31, 2017

Average Annual Total Returns - Great-West International Index Fund	One Year	Five Years	Since Inception		Inception Date
Institutional Class	25.10%		5.20%	[1]	May 01, 2015
Institutional Class | MSCI EAFE® Index (reflects no deduction for fees, expenses or taxes)	25.03%		5.28%	[1]	May 01, 2015
Investor Class	24.62%	7.11%	5.11%	[2]	Jan. 13, 2011
Investor Class | MSCI EAFE® Index (reflects no deduction for fees, expenses or taxes)	25.03%	7.90%	5.97%	[2]	Jan. 13, 2011

[1] Other Expenses are estimated for Class L shares because the class has not yet commenced operations.

[1] Since inception on May 1, 2015

[2] Since inception on January 13, 2011