Former Macclesfield and Bradford winger Evans was released by Rotherham on Monday and Cod Army boss Graham Alexander has moved quickly to secure the 24-year-old's services.
Gyorio, a former Canada Under-20 international, is a Serbian-born attacking midfielder who last played for FC Tampa Bay in the the North American Soccer League.
The 23-year-old was without a club in 2012 having failed to win a contract following a trial spell with MLS outfit Sporting Kansas City.
At present, the length of Evans contract is undisclosed, although it is understood it runs beyond summer 2013, while Gyorio has agreed terms until the end of the season.
Earlier on Wednesday, Fleetwood secured a deal to bring Birmingham goalkeeper David Lucas to the Lancashire coast as a player/coach.