The nearest proxy for an IQ test I have is my SAT, which I took early in my HS junior year, after no prep work, got the results and said, "good enough." Mensa still considered it a proxy for IQ at the time I took it, and the score qualifies me for membership, so I'll go ahead and call myself gifted.

DD took the RIAS as part of her screening for G/T at school, and scored in the 99th percentile. There are other tools that can be used for a more reliable and complete picture, but for the purpose she was testing for, the result was plenty "good enough," so we're not pursuing it any further.