The two usages you reference are older than a decade. With a minute or so of searching I found plausible examples of adverbial "super" (I think the same as what you're talking about) from the 1930s and 1940s.
"Ginormous" is certainly more recent, but a quick search found some examples from the late 1980s, and here's evidence of a usage from 1960:
https://books.google.com/books?id=4eECAAAAMAAJ&q=ginormous&dq=ginormous&hl=en&sa=X&ei=B--gVPDzM4HBgw...
Ginormous is reminiscent of the likely somewhat older "humongous" (a similar portmanteau-ish formation). It was in fairly wide use when I was a child. I gather that proprietary relicensing company MongoDB (fka 10gen) claims that the "Mongo" in "MongoDB" is a shortening of "humongous", apparently in reaction to complaints that "mong(o)" is or was a derogatory term for a person with Down Syndrome (trisomy 21) in some varieties of English.
"Ginormous" is certainly more recent, but a quick search found some examples from the late 1980s, and here's evidence of a usage from 1960:
https://books.google.com/books?id=4eECAAAAMAAJ&q=ginormous&dq=ginormous&hl=en&sa=X&ei=B--gVPDzM4HBgw...
Ginormous is reminiscent of the likely somewhat older "humongous" (a similar portmanteau-ish formation). It was in fairly wide use when I was a child. I gather that proprietary relicensing company MongoDB (fka 10gen) claims that the "Mongo" in "MongoDB" is a shortening of "humongous", apparently in reaction to complaints that "mong(o)" is or was a derogatory term for a person with Down Syndrome (trisomy 21) in some varieties of English.