If you worked full-time most of your life you probably maxed out your CPP so max $1,114 (CPP) and $579 (OAS) depending on circumstances. GIS is $526-$874 depending on marital status and is clawed back starting at $17,760  (single) or $23,472 (couples) annual income.

Full details here:
https://www.canada.ca/en/services/benefits/publicpensions/cpp/old-age-security/payments.html#tbl1