Hello,
A seizure is a brief, temporary disturbance in the electrical activity (neurons) of brain and such disturbance if happens recurrent it is called as Epilepsy.
Yes, your father can be treated very well with Homeopathy.
It seems to be a constitutional problem and if treated with a well selected Homeopathic Constitutional Medicine, there is definite scope of cure for your father's illness.
Next Steps
You should consider contacting a Homeopath for the same.
Health Tips
Don't go for over the counter Homeopathic medicines, a remedy selected for him after a well taken case will help him better.