Yes, put the gross amounts from all of your accounts on line 10, Part II of Form 4797. There is no need to prepare separate Forms 4797 for each account. You probably have the option to combine all of your account activities into one attached statement (as per IRS instructions, the statement should follow the same format as line 10, showing the details of each transaction, and further, the statement should separately show and identify securities or commodities held and marked to market at the end of the year), or you could have one statement for each account.
Given that Form 4797, line 10 will reflect the totals from all accounts, if you decide to have separate statements for each account, there is probably no need to also include a statement showing the totals from all brokerage accounts as that would be redundant given that the totals from all accounts have already been entered on Form 4797.
@Troy09
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