geugeo = that (near you)

A thumbs-up hand says Good and pokes a bubble of Gum floating next to the listener: That one, by you.

How to remember 그거

Each sound in geugeo has a picture. Put them together and you get the scene above.

그
geu → Good

거
geo → Gum

For something near the person you are talking to.

그거 거미예요.

Geugeo geomi yeyo.

That's a spider, by you.

Learn geugeo in Korean lesson 6, free.