The Argentinean, 36, has passionately supported the Light Blues since he first started picking up videos of their matches in Buenos Aires in 1989.
He has wanted to come to watch a game at Ibrox for more than two decades and flew 7,000 miles to the UK at the end of last month as he finally started his pilgrimage to Glasgow.
After watching the 0-0 draw with Montrose at Links Park on TV in London, Hernan made his way up to Scotland via Manchester and Liverpool.
And he finally got his wish on Wednesday night when he attended the 2-0 friendly win over Linfield.
Hernan and his wife Carla did a tour of the stadium yesterday and were asked along to Auchenhowie this morning as guests of the club to see the facility and watch training.
As well as the manager, Kenny McDowall and Ian Durrant, they met the players and watched the pre-match press conferences ahead of tomorrow’s match with Clyde.
Hernan presented a gift from his homeland to McCoist but was stunned when skipper Lee McCulloch then gave him a shirt signed by the whole first-team squad moments later.
Skipper McCulloch also extended an invite into the dressing room after the fixture against the Bully Wee to meet everyone once again.
Hernan is well known to many Rangers fans after we first told his story back in August 2011 and his online blogs about the club are popular with supporters.
They’ll have a chance to show their appreciation for the efforts he has made to see Gers play live after following them from afar for so long before tomorrow’s game.
Hernan and Carla will be amongst fans who take part in the usual flag-bearers ceremony on the centre circle prior to kick-off.
The pair will attend next week’s game with Peterhead then make the trip to East Stirlingshire on April 27 before they go back to South America.
Once they return home, they’ll be able to tune into a special feature on Hernan’s journey on RangersTV.
We followed him around the club’s training complex earlier to record the best bits of his day and we’ll keep tabs on his progress over the next fortnight as well.
Hernan said: “It has been the most fantastic day of my life. I grew up in the Nine in a Row generation and I have been planning to come here for a long time.
“In 1995, my father promised me we could go to Scotland but circumstances made it impossible for us to do that.
“It is emotional for me to be here now. I have saved money to make my trip here for a long time and that has been difficult because of the problems in my country with the economy.
“But after waiting all this time, it is very special to be here now. I love this club – I always have and I always will, all my life.
“Coming to Ibrox for the first time was great because I imagined what it would be like from the pictures I’ve seen and it is even better than I thought.
“This has been a huge experience for me and I have wanted to be here at Rangers for most of my life. I’ve felt like a child today.
“To meet Ally was amazing. When people asked me who my idols were as a child in Argentina, I told them I had two.
“Diego Maradona was one and Ally McCoist was the other. He represents everything about Rangers and its fans. He is our leader, our scorer, everything.”
You can follow Hernan on Twitter @hernanfpacheco and also read his blog by clicking HERE now.