Help Gordo get his ultrasound & needed treatment

As you guys know I have a cat named Gordo that I love dearly, Gordo has been with me since November of 2016 ( 4 years ). I first saw Gordo as a kitten at my son's bus stop and I thought he belonged to someone , then I started to noticed that he would only come to the bus stop when we went , little by little he would get closer to us and eventually he let us pet him, Then I realized he would always come out from behind the dumpsters. One day as I walked to the bus stop I saw this lady throwing water at him for him to leave from the front of her building and when he saw me he came running to me that's when I knew he felt safe with me so I decided to take him in. I still remember that day I took him home, he made himself at home and cuddled next to my son and next thing you know he was laying on my bed like the king he is. I can say that I saved him from the streets, but Gordo saved me from a very dark hole I was in & if you're not an animal person you wouldn't understand but if you have a pet you'll know what I mean, Gordo would come cuddle with me when he would see me cry , it's like he knew I was sad, he was there with me every time I cried, every time I was sick, he's such an amazing cat, loving and very very patient, when my daughter was just a toddler she would grab his tail and never has he bit her he always put up with it, it's like he knew she was a baby. The reason why I'm writing all this is because a couple of days ago we noticed Gordo wasn't himself and 2 days ago he got worse, one of his pupil was more dilated than the other, he didn't eat or drink anything, he wanted to stay in the room and eventually he just didn't want to get up , he started throwing up and yesterday he collapsed as I put him in his carrier to take him to the vet. I'm completely heartbroken and have been in tears since yesterday because I hate to see my sweet Gordo like that. The vet told me Gordo has a heart mumur and feline leukemia, (Idk how if I always take him for his vaccinations) he also told me the reason why he's sick is because he was having a stroke, they did some blood work and thank God his blood work came back normal, but I do need to get an ultrasound for his heart to make sure he doesn't have a heart disease, The ones who personally know me know that I've always worked and always took care of my family on my own & never asked anybody for anything, but there's always a first time for everything. If you personally know me you know I'm currently not working and why. I paid $340 yesterday for the vet, but the ultrasound that he needs is anywhere from $400 to $600 dollars which atm I can't afford. As much as I hate depending on people or asking for favors I decided to create a Go Fund me for his ultrasound, ANYTHING HELPS even a share!! So I ask you guys to please help me , like I said even if it's $1 anything and everything is truly appreciated & if you're one of those who don't really care for animals and think this is stupid that's okay each have a different opinion and to me he isn't just a pet he is part of my family so if you can't help with any donations at least help by sharing the link. I will truly appreciate it. I also have cash app My cash app is $alicias92