Nursing programs have different ways of computing GPAs for admission. Some may only include program pre-requisites, others may only include the last grade obtained if you have repeated a course. . . so you need to contact those programs to obtain specific information about admission to their nursing programs. FYI, the UT system has nursing programs all over the state & many are much less competitive than UTMB. You may also want to explore an interesting pre-licensure online program that is offered by TAMU-Corpus Christi. I believe it is called "e-line" It's been around a while, so it has a proven track record along with full accreditation - with the added attraction of 'normal' in-state tuition for Tx residents.
Please don't mortgage your future with crippling debt in search of a shortcut to a nursing degree. Seriously, with the uncertainty of nursing jobs today (especially for new grads) it just doesn't make sense.