Mosfet \$\mathrm{V_{GS}}\$ not in datasheet
As pointed out, \$\mathrm{V_{GS}}\$ is something that you set.  I assume you want to know the \$\mathrm{V_{GS}}\$ at which the part is rated.

Usually the best place to look is the \$\mathrm{R_{DS}}\$ spec.  That will give the \$\mathrm{V_{GS}}\$ at which the thing is rated.  For logic-level FETs, you might see multiple \$\mathrm{R_{DS}}\$ listed, each at a different \$\mathrm{V_{GS}}\$ (e.g. 3.3V, 5V, 10V).

Typical is 10V -- if it doesn't say it's logic-level, and if it's a silicon device (as opposed to silicon carbide), you're safe to assume that its rated for 10V.