Yes but most important think in chess is if you dont have to loose in opening then play in 4. or 5. move O-O or O-O-O. I think kong's gambit is one of the worsts opening for white. Today nobody dont play king's gambit, I think for chess top grandmasters.
BIshop gambit against king gambit...best solution?

4. Na4 is a poor move, for the exact reasons you give. If you really want to make sure you'll be able to castle on the kingside, you shouldn't play 3. Nc3, instead play Nf3 to prepare c3 and d4. Better yet, if kingside castling is something you can't live without, don't play the King's Gambit. :) It's not an accomadating opening, and it's not for the faint of heart.

You need to play that if you want preety fast castling...thats bishp openong and why you want to change that...

You need to read some opening books.
hah ok but i just read this on wikipedia and wanted to show you...

I have played 1.e4 e5 2.f4 Bc5 a few times with success when I want to play the King's Gambit Declined. Here is a short one.

hah men you dont undersand me...bishop gambit is when black plays bishop c5..bishop gambit havee for white 2. Bc4 and for black 2.f4 Bc5

Lovčev gambit crnog (2. .. Lc5)
Ovim potezom lovca, crni privremeno ili potpuno može odložiti malu rokadu belog, i beli često troši dva tempa da bi se oslobodio pritiska lovca, pomerajući daminog skakača na c3 i potom na a4, samo da bi ga menjao za crnopoljca crnog na c5, posle čega beli može spokojno rokirati. Takođe, ovaj potez sadrži zamku za početnike: ako beli uzme pešaka sa 3. fe5??, crni nastavlja 3. .. Dh4+, posle čega beli u jednom slučaju gubi topa (4. g3 De4+, i „visi“ top na h1), ili u drugom slučaju, matira belog (4. Ke2 De4#). Smatra se da se u ovom otvaranju belom daje previše prostora u centru nakon nastavaka kao što su 1. e4 e5 2. f4 Lc5 3. Sf3 d6 4. c3 Sf6 5. d4, ili 5. fe5, i zbog toga, uprkos enormnoj popularnosti tokom XIX veka, danas je veoma retko u majstorskoj praksi.
This is on serbian language...I dont want to translate because somebody make me a fool there...you have online translator and trasnlate then you will see that I am right...
Hi...I need to show to you something.It's answer on king's gambit.Bishop gambit is only just for player who play 1. e4 e5...thats not opening for me because i play sicillian c5...
1. e4 e5 2. f4 Bc5
In this position king cant do 0-0 he need to play...
There knight need to play Kc3 and then a4 to change knight for bishop. Thats loosing a tempo and in opening now black is better. In this opening is trap for white if amateur play this.
But there is also second trap, worst trap.
Now if you play against king's gambit remember my topic on forum cheers.