2.4.0.8000270 - Disclosure - 1. Basis of Presentation and Summary of Significant Accounting Policies: Loss Per Share (Policies)truefalsefalse1false falsefalseY13Q2http://www.sec.gov/CIK0001399306duration2013-04-01T00:00:002013-06-30T00:00:001true 1us-gaap_PolicyTextBlockAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Policies2false 2us-gaap_EarningsPerSharePolicyTextBlockus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Loss Per Share   Basic loss per share of common stock is computed by dividing the net loss by the weighted average number of common shares outstanding during the period after giving retroactive effect to the forward stock split effected on January 14, 2008 (see Note 12.) Diluted earnings (loss) per share is equal to the basic per share for the years ended March 31, 2013, 2012, and 2011. Common stock equivalents are not included in the loss per share since they are anti-dilutive.  falsefalsefalsenonnum:textBlockItemTypenaDisclosure of accounting policy for computing basic and diluted earnings or loss per share for each class of common stock and participating security. Addresses all significant policy factors, including any antidilutive items that have been excluded from the computation and takes into account stock dividends, splits and reverse splits that occur after the balance sheet date of the latest reporting period but before the issuance of the financial statements.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2144384 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3630-109257 false0Loss Per Sharefalse1. Basis of Presentation and Summary of Significant Accounting Policies: Loss Per Share (Policies)UnKnownUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.gridpetroleum.com/20130630/role/idr_Disclosure1BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLossPerSharePolicies12