Us gaap - report

US GAAP,Indian GAAP or IFRS GAAP .....there are very few differences now actually.The concept is if you go to a doctor & he takes a pulse temperature reading it will be the same between 2 doctors....similarly the Indian GAAP has also converged into US/IFRS...substantially.

https://gtw3.grantthornton.in/assets/Drawing_a_parallel_Comparison_between_Indian_GAAP_IFRS_and_US_GAAP.pdf

That document will tell you the areas of differences between the Indian,IFRS,US GAAP system.Normally you prepare your financial books in your local currency,then you open up another book called IFRS Book or US GAAP book & book the adjustment entries for differences of assets,liabilities,income,expenses & equity accounts in local currency.After that is done then you will use a monthly table of FX rates to convert them into Reporting currency which is USD.