Manu Ginobili might be retired ... but San Antonio Spurs star Pau Gasol's clearly still in his prime ... taking his insanely attractive GF out for a romantic trip to Ibiza ... and the pics are straight fire.
38-year-old Pau is dating Cat McDonnell -- a former USC cheerleader who has a background working for a big time finance company. They've been IG official since 2016.
The couple looked to be having a great time on Pau's home soil ... going on boat rides, cozy dinners and other mushy stuff.
And also, she looks absolutely INSANE in a bikini.