GPA Reporting

I have a bit of an odd scenario where I attended a relatively prestigious high school program for the last 2 years of high school. During these two years, I took full course loads on a college campus. (https://tams.unt.edu/) While these credit hours transferred to my undergraduate program, the GPA did not. I completed my undergraduate program in 3 years. At the end of my undergraduate career, 40% of my credit hours were from this program, transferred in as credit, without GPA. The end result, was that I didn't have any sort of "GPA Buffer" from taking basic science, math, and humanities courses that included everything from Organic Chemistry, Multivariable Calculus, and Political Science. Essentially a lot of the easy A's are missing. It's a bit tricky because as a part of the aforementioned program, we were in an ambiguous state as to whether we were high school or college students. Our grades affected the college course curves, but I'm not sure that we were considered as full-time students by the college. When applying for undergraduate programs, we were instructed to apply as incoming freshmen and not as transfer students. Credits from this program are often accepted within Texas state schools, but not outside of Texas.

Is it disingenuous to calculate and report what my GPA would have been including the 40% GPA credit? I.e. is it possible to calculate my GPA as if all of my undergraduate work was at one undergraduate institution? To give you a rough idea, this ends up being a difference of about 0.5 in my GPA (say a 3.6 vs. a 3.1).