This year the gay pride takes place from the 19th until the 25th of May.
If you want more information about your next stay in Gran Canaria have a look at this site. Free (printable) maps & guides (under ‘yes i am here’), phone apps, live webcams and much much more. All the (official) tourism information you could need together on one handy site… : The Gran Canaria official tourism website
Global SU is the public bus company on Gran Canaria. More information about lines, times and prices can be found on: http://www.globalsu.es/en/lineas.php (for transport to/from the airport you can take bus 66 and take the stop at “Cita”)