Yes, the IGC gives Portugal some historical leaders after 1550.
If you just want to edit them yourself, here are those additions:
(The last one is not official for the IGC yet.)
The IDs should not conflict with the GC settings in this case, I believe.
historicalleader = {
id = { type = 6 id = 1590 }
category = explorer
name = "Antonio Fernandes"
startdate = {
year=1602
}
deathdate = {
year=1624
}
rank = 9
movement = 4
fire = 1
shock = 1
siege = 0
}
historicalleader = {
id = { type = 6 id = 1591 }
category = general
name = "Friedrich von Schönberg"
startdate = {
year=1659
}
deathdate = {
year=1668
}
rank = 2
movement = 4
fire = 2
shock = 2
siege = 0
}
historicalleader = {
id = { type = 6 id = 1592 }
category = general
name = "Antonio Louis de Sousa"
startdate = {
year=1703
}
deathdate = {
year=1715
}
rank = 1
movement = 3
fire = 2
shock = 2
siege = 0
}
historicalleader = {
id = { type = 6 id = 1593 }
category = conquistador
name = "Pedro Teixeira"
startdate = {
year=1616
}
deathdate = {
year=1639
}
rank = 4
movement = 4
fire = 2
shock = 2
siege = 0
}
historicalleader = {
id = { type = 6 id = 1486 }
category = explorer
name = "Pedro Fernandes de Quieros"
startdate = {
year=1595
}
deathdate = {
year=1615
}
rank = 9
movement = 4
fire = 1
shock = 1
siege = 0
}
Here are some home historical additions I also use:
historicalleader = {
id = { type = 6 id = 1487 }
category = general
name = "Wilheim von Lippe"
startdate = {
year=1762
}
deathdate = {
year=1765
}
rank = 2
movement = 4
fire = 2
shock = 2
siege = 0
}
historicalleader = {
id = { type = 6 id = 1488 }
category = explorer
name = "Amerigo Vespucci"
startdate = {
year=1501
}
deathdate = {
year=1503
}
rank = 4
movement = 5
fire = 2
shock = 2
siege = 0
}