Just use "jakby" instead of "jak gdyby", I'm Polish native and I'm not sure I've ever used "jak gdyby" before in my life, some people do, but it's not common so don't waste Your time.
Google helps:
Results 1 - 10 of about 11,600,000 for "jakby"
Results 1 - 10 of about 657,000 for "jak gdyby"