I used to really struggle with gate fold cards until I got a scoring board. Now I just grab a sheet of A4 card, bung it on the scoring board, score at "Gatefold A4", turn and repeat. A perfectly scored gatefold card every time.
For this card I then cut the card down to a square, simply because I almost always make gatefold cards the full height and wanted a change!
I sandwiched the ends of the ribbon underneath the deep burgundy panels on the card front and edged everything with gold peel off borders to echo the gold edges of the ribbon. (Oops, I can see the peel off on the inside oval needs tidying up, I'll do that once I have posted this!)