Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information - USD ($)
12 Months Ended
Sep. 30, 2017
Dec. 29, 2017
Mar. 31, 2017
Document And Entity Information      
Entity Registrant Name GULFSLOPE ENERGY, INC.    
Entity Central Index Key 0001341726    
Document Type 10-K    
Trading Symbol GSPE    
Document Period End Date Sep. 30, 2017    
Amendment Flag false    
Current Fiscal Year End Date --09-30    
Entity a Well-known Seasoned Issuer No    
Entity a Voluntary Filer No    
Entity's Reporting Status Current Yes    
Entity Filer Category Smaller Reporting Company    
Entity Public Float     $ 12,599,844
Shares held by non-affiliates     434,477,388
Entity Common Stock, Shares Outstanding   698,526,625  
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2017