King gambit accepted is a good opening.Nowadays to that it is preferred more solid openings.If u like to attack and u r quite good positionally i suggest u to study your lines of king gambit.About your question of gm i cannot tell u.If u play better than him u should be able to beat him.
king gambit accepted
Sort:
There are really much.
For example, after 2. F4 Ef 3. Nf3... Computer like to play G4 or be7 but not falkbeer variant...
Is it possible to learn opening so perfectly - to have won against gm ?
Sorry for bad English.