Would I have thousands of dollars right now if I bought stocks in GameStop last week?

No one can answer this question.

How much money were you willing to invest ?
How many shares were you willing to buy ?
When would you have sold it ?

Unless you buy the stock and then sell, it's the only way some one cold answer the question as to how much you would have made.

Would have, could have, should have does not make any money in the market.

you'll have to wait and see

No. Because you need money to buy stocks and you have none.

Article on Marketwatch today: A mother bought her 8 year old 10 shares of Gamestop two years ago,, as a Kwanza gift. She even made up a 'Stock Certificate' for him to frame. She spent $60. He is 10 now and just sold those shares for $3,200. 

You asked this on the day it caved $153.91. It ended at $193.60. Since thousands is any thousand more than 1 thousand, youd have to have had just 11 shares to get more than 2 thousand. The last day of last week was Jan. 22. It ended at $65.01. So yes, you would need at least 11 shares bought last week to have thousands this week. Any other math, you do.